geometry vocab Flashcards

1
Q

location with no size or shape

A

point

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2
Q

made up of points with no thickness or width

A

line

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3
Q

a measurable part of a line consisting of two endpoints

A

line segment

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4
Q

a line that extends indefinitely in one direction

A

ray

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5
Q

a flat surface made up of points and extends indefinitely in all directions

A

plane

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6
Q

points that lie on the same line

A

collinear

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7
Q

points that lie on the same plane

A

coplanar

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8
Q

segments that have the same length

A

congruent segments

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9
Q

if a, b, and c are collinear points and b is between a and c, then line ab + line bc=ac

A

segment addition postulate

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10
Q

the formula used to find the midpoint between 2 endpoints

A

midpoint formula

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11
Q

the formula used to find the distance between 2 points of a coordinate plane

A

distance formula

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12
Q

a segment, line, or plane that intersects a segment at its midpoint

A

segment bisector

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13
Q

two lines that intersect at a 90 degree angle

A

perpendicular

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14
Q

A line segment or ray perpendicular to a segment at its midpoint

A

Perpendicular bisector

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15
Q

two lines that never intersect

A

Parallel lines

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16
Q

The intersection of two rays at an endpoint

17
Q

The common endpoint of an angle, where the sides intersect

18
Q

an angle with a degree measure of 90°

A

Right angle

19
Q

an angle with a degree measure of less than 90°

A

acute angle

20
Q

An angle with a degree measure of greater than 90°

A

Obtuse angle

21
Q

An angle with a degree measure greater than 90°

A

Obtuse angle

22
Q

an angle with a degree measure of 180 degrees

A

Straight angle

23
Q

two angles that have the same measure

A

Congruent angles

24
Q

two angles that share a common side in vertex

A

Adjacent angles

25
if ABD and DBC are adjacent then ABD plus DBC equals ABC
Angle addition, postulate
26
A line or ray that divides an angle into two equal parts
Angle bisector
27
two angles directly across from each other on intersecting lines, always congruent
Vertical angles
28
Two angles with measures that sum to 90° they do not have to be adjacent
Complementary angles
29
two angles with measures that sum to 180° they do not have to be adjacent
Supplementary angles
30
Adjacent angles that are supplementary. Combined, they form a straight line.
linear pair